Pump jack



Dec. 28, 1926. 1,612,196

c. J. KUECHLER PUMP JACK Filed March 1., 1926 2 Sheets-Shet 2 INVENTORI QHTTORNEX Patented Dec. 28, 1926.

CHARLES J. KUECI-ILER, OF PRESCOTT, WISCONSIN.

PUMP JACK.

Application filed March 1. 1226. Serial no. 91. 294.

My invention relates to improvements in pump jacks and the main object is to provide a simple, efficient and powerful pump jack providing direct vertical movement to the pump rod reciprocating means and eliminating the so-called whip of said parts. A further object is to improve on and sinr plify my pump ack Patent No. 1,501,221 issued July th, 1924.

In the accompanying drawings:

Fig. 1 is a front elevation of my improved pump jack inoperative position on a pump.

Fig. 2 is a sectional view as on line 22 in Fig. 1.

Fig. 3 is a front elevation of the lower part of F ig. 1 showing certain parts of my device in operative position to provide short strokes on the pump rod.

Fig. 4 is a detail elevation of one of the link members 23.

Referring to the drawings by reference numerals 5 is the platform base of the pump, 6 the column, 7 the spout and 8 the vertically reciprocable pump rod of a pump of the usual type. 9 are bolts suitably securing the base 5 to the platform or other foundation The main working parts of my device are mounted on or within a large casting comprising two horizontally spaced identical worn'i-gcar and worm housings 11 connected by two integral vertically spaced bars 12 both offset centrally and having central vertically registering cavities 12 said latter parts adapted to be clamped against the tubular pump column 6 and held rigid by a U-bolt 13 in each bar and nuts 14 for tightening. the entire casting thus being mounted with the worm gear housings located on opposite sides of the column from spout 7.

15 is a horizontal worm shaft of one or more sections journaled in both housings 1] in each of which it carries a worm 16 within the upper part of each housing, each worm meshing with a worm gear 1.7 mounted on a lmrizontal shaft 18 journaled in the housing and protruding forwardly therefrom. T he worm gears are in aliuement and therefore shafts 18 are parallel. the latter being spaced equidistant each side of the pump column. One worm is right hand and the other left hand, both of course rotated simultaneously and causing the worm gears to be rotated, one clock-wise and the other counter clockwise. The shaft 15 adapted to be retained in either aperture 22 of each crank there being such an aperture 22 provided at each end. 23 are downwardly forked. connecting rods, or links, the upper end'of each of which is pivotally engaged by a pin 21 and the forked. lower end of each rod connected pivotally at 24 to the adjacent vertical pump bar 25 willfnow be described.

The pump rod reciprocating means comprises a vertically elongated quadrangular frame with two upright bars 25 the upper ends of which are detachably secured by bolts 26 to an upper cross arm 27 suitably attached as at 28 to the pump'rod 8 (see Fig. 1). This frame comprises further a lower horizontal bar 29 arched forward centrally as 29 (Fig. 2) to clear the pump column. The lower end of each bar 25 and bar 29 are drilled to be simultaneously retained pivotally between the lower forked ends of a link 23, on bolt 24. The forked ends of the links 23 have two pairs of apertures 30 at different distances from the fulcrum pin 21. Assuming that a long stroke is desired for the pump rod the forked links 23 are pivotally secured with their upper ends at 21 to the ends of the long arms 20 of cranks 20 and the lowest apertures 30 of each forked link are used to pass bolt 24 through bar 29 and upright 25 (as in Fig. 1). 27 are a row of apertures in the cross arm 27, the bolts 26 being inserted in said apertures and bars 25 so as to keep the bars 25 parallel according to the spread at the lower ends of said bars 25. It will be read ily understood that whenpower is applied the worm gears and their respective cranks operate simultaneously and oppositely as indicated by arrows 31 in Fig. 1, the frame bars 25 will receive powerful vertically reciprocating movement being moved by the vertical action of the pivot bolts 24 as the links 23 are moved similar to a connecting rod on a locomotive, tlms producing a maxibecause of the shortened links num possible stroke of the pump rod and frame without any so-called whipping of the rods 25 because the latter are constantly held parallel and here is no jarring effect on the upright frame on the downward stroke.

I have shown the forked ends of the links offset inwardly (see Fig. 1) to allow the bars 25 to be arranged close to the said links 23 when long pump strokes are desired. In Fig. 3 the same links are arranged to produce short strokes the fulcrum pins 21 being engaged in the short arms 20 of the cranks. the lower ends of bars 25 pivotally mounted nearer the outer ends of the bar 29 but the offset ends of links 28 reversed so that the projecting ends will clear the offset part of bar 29 during the vertical movement of the latter. It is obvious from the above description and the drawings that for short strokes the uprightbars 25 must be spread hat I claim is:

1. In combination with a pump having an n; right fixed column, a base for said column and a pump rod extending above said column,'a pump jack comprising a pair of horizontally spaced gear housings, means connecting said housings and adapted to be detachably secured tothepump column in vertically spaced relation to the pump base, a worm gear and worm in each gear housing'and a driving shaft keyed to both said worms and means for rotating said shaft, a shaft for each worm gear extending outwardly from its housing and a crank on the outer end thereof with one short arm and one long arm, a vertically reciprocable elonnew gated quadrangular pump frame detachably connected with its upper end to the pump rod and link connection between one arm of each said crank and the adjacent lower end of the pump frame.

2. The structure specified in claim 1 in which said pump frame comprises two ver tical, parallel bars arranged one at each side of the pump column, an upper cross head securable to the pump rod and a lower cross head securable pivotally to the lower ends of the uprights and the lower ends of the adjacent links.

3. The structure specified in claim 1 in which said pump tt'rame conuprises two vertic-al, parallel bars arranged one at each side of the pump column, an upper cross head securahle to the pump rod and a lower cross head securable pivot-ally to the lower ends of the upright bars and the lower ends ot' the adjacent links, means on said cross heads for securing saidupright bars in variously spaced relation to each other, said link connections comprising each a clownwardly fork-ed bar the upper end of each said link pivotally securable in either arm of the worm gear crank and the forked lower end of each link provided with horizontally registering pairs of apertures arranged to receive a pivot pin adapted to retain pivotally the said lower end of the link bar with the lower end of one upright frame bar and one end of the lower cross head bar in selectively spaced relation to the upper pin of each link and according to the length of stroke desired.

In testimony whereof I affix my signature.

CHARLES J. KUECHLER. 

